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VERTICO II: How H i -identified environmental mechanisms affect the molecular gas in cluster galaxies

Zabel, Nikki, Brown, Toby, Wilson, Christine D., Davis, Timothy A. ORCID:, Cortese, Luca ORCID:, Parker, Laura C., Boselli, Alessandro, Catinella, Barbara, Chown, Ryan, Chung, Aeree, Deb, Tirna, Ellison, Sara L., Jiménez-Donaire, María J., Lee, Bumhyun, Roberts, Ian D., Spekkens, Kristine, Stevens, Adam R. H., Thorp, Mallory, Tonnesen, Stephanie and Villanueva, Vicente 2022. VERTICO II: How H i -identified environmental mechanisms affect the molecular gas in cluster galaxies. Astrophysical Journal 933 (1) , 10. 10.3847/1538-4357/ac6e68

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In this VERTICO early science paper we explore in detail how environmental mechanisms, identified in H i, affect the resolved properties of molecular gas reservoirs in cluster galaxies. The molecular gas is probed using ALMA ACA (+TP) observations of 12CO(2–1) in 51 spiral galaxies in the Virgo cluster (of which 49 are detected), all of which are included in the VIVA H i survey. The sample spans a stellar mass range of 9≤logM⋆/M⊙≤11 . We study molecular gas radial profiles, isodensity radii, and surface densities as a function of galaxy H i deficiency and morphology. There is a weak correlation between global H i and H2 deficiencies, and resolved properties of molecular gas correlate with H i deficiency: galaxies that have large H i deficiencies have relatively steep and truncated molecular gas radial profiles, which is due to the removal of low-surface-density molecular gas on the outskirts. Therefore, while the environmental mechanisms observed in H i also affect molecular gas reservoirs, there is only a moderate reduction of the total amount of molecular gas.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Additional Information: License information from Publisher: LICENSE 1: URL:, Type: cc-by
Publisher: American Astronomical Society
ISSN: 0004-637X
Date of First Compliant Deposit: 29 June 2022
Date of Acceptance: 9 May 2022
Last Modified: 10 Nov 2022 11:32

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